Rural Japan | Where have all the young men gone? | Economist.com
For more on the almost certain demographic decline of Japan, have a read of the above article.
Over the next half century, demographers expect Japan's population to fall to from 128m to 100m. The process began last year, the first peacetime fall in population since records were kept. Yet in the countryside numbers have been falling for decades—and rural Japan will bear a disproportionate share of the future reduction in population. Already, more than two out of five people living in rural communities are 65 or over.
The only good thing I can see out of this is that maybe Japan has a built in way of reducing green house gas emissions over the next 50 years!